* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
a,
a:hover,
a:focus {
    // 移除移动端轻触高亮 (cursor:pointer)
    -webkit-tap-highlight-color: transparent;
    text-decoration: none;
    color: #000;
}
input , button {
    border: 0;
    outline: none;
}
ul , ol {
    list-style: none;
}

.fl {
    float: left;
}
.fr {
    float: right;
}
.clearfix {
    content: "";
    display: block;
    clear: both;
}